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O

noun

a dirty or unpleasant task that one must do since it is part of one's share of the work, and that others have taken their turn doing before them. In the military, it is sometimes referred to doing KP, but in times of combat, might have been used to mean taking on a very dangerous chore such as walking point on recon.

There is a vulgar joke associated with the phrase about soldiers putting their penises through a hole in a barrel to receive oral sex. When a new recruit asked who was in the barrel, he was ordered to shut up. Several days later he was told it was his "turn in the barrel." I'm not sure if the vulgar joke is the source of the phrase. In spite of its crude references I have heard Generals and Admirals on CNN use the term to describe taking their turn at an unpleasant task.

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P

noun - uncountable

Pete Best was the Beatles drummer in the years just prior to their breakthrough in the record industry. He was abruptly fired on the eve of their first Parlophone recording session. Ringo Starr was hired in his place. Every musician lives in fear of "getting the Pete Best" to this day.